Automatic window lock



July 5, 1949. c. J. DAWSON AUTOMATIC WINDOW LOCK Filed May 30, 1945 11v; 'mvwa, CZARE/VCE a. DA WSON,

Patented July 5, 1949 UNITED STATES i ATENT OFFICE AUTOMATIC WINDOW LQCK Clarence J. Dawson, Detroit, Mich.

Application May 30, 1945, Serial No. 596,657

1 Claim. 1

This invention relates to an automatic window lock.

An object of the invention is the construction of a novel and efficient device for preferably retaining or holding sliding sashes in a closed position.

Another object of the invention is the construction of a novel and eiiicient lock in which means are provided for taking up the shock when the sashes to which the device is applied are tampered with, or are fraudulently attempting to be operated, such as when a burglar would be trying to raise or lower the sashes to enter the building, of which the sashes are a part.

A still further object of the invention is the construction of a novel and eflicient window lock employing an anvil bar in connection with a peculiarly constructed latch bar, all being assembled in an efiicient and novel manner.

With the foregoing and other objects in View, my invention comprises certain novel constructions, combinations and arrangements of parts as will be hereinafter fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claim.

In the drawings:

Figure 1 is a view in elevation of a device constructed in accordance with this invention, shown in an applied position upon the window sashes.

Figure 2 is a sectional view taken on line 22, Fig. l, and looking in the direction of the arrows.

Figure 3 is an enlarged vertical sectional View the device.

Figure i is a sectional view taken on line i-d, 3, and looking in the direction of the arrows. Figure 5 is a perspective view of the casing.

Figure 6 is a per...pective view of the elongated anvil bar.

Figure 7 is a perspective view of the U-shaped saddle bracket.

Referring to the drawings, in which the preferred embodiment of this invention is illustrated, i designates the lower sash and 2, the upper sash. The casing 3 is placed on the top of lower sash i. This casing 3 comprises a hollow body 4 which cut-cut portion 5, and is provided with two horizontal flanges 5. Screws l are employed for holding the casing in a secured position upon l. The cut-out portion 5 has a pair of notches l for the purpose hereinafter described.

An elongated anvil bar 8 is employed, which saddle notch 53 in its top portion, and a bracket socket it? formed in its lower face. A transversely positioned depending lip l l is on the inner end of anvil bar 8, which lip extending down against a portion of the inner face of the lower sash l as clearly seen in Figure 3. This lip it serves to remove considerable of the strain off screws l, whereby the casing 3 is securely retained in position.

A U-shaped saddle bracket [2 is employed, the bracket being placed in bracket socket is, and apertures 53 of said bracket register with the saddle socket 9.

A latch bar it has its inner or lower end rest ing down between the sides of said saddle bracket it, with a bolt 15 extending through apertures i3 and the large aperture H3 in said latch bar it; said bar is adapted to swing or move in a vertical plane parallel to the longitudinal axis of said anvil bar. Any blow upon the upper end of the latch bar M will not cause any strain on bolt 95, because its aperture i6 is sufliciently large to permit the lower or inner end of said latch bar M to strike or engage firmly the saddle socket 9 of the anvil bar 8; this novel construction greatly increases the life of the device, by reason of the strain being entirely removed from bolt It.

The elongated latch bar l4 has a knob or grip l 1 near its upper end, which the operator grasps when he desires to manipulate the divice. The latch bar it is provided with a notch l8 on its upper or outer end, and with a lip IS. The latch bar M is slightly rounded at 26, Fig. 3, so that it will not cut into the upper sash 2; further, by this peculiar construction, the bar is easily manipulated by the operator for removing the bar from its locked position, or permitting it to assurne a locked position. A keeper plate 25 is provided, which is adapted to receive the upper or outer end of the latch bar M, as clearly illustrated in the drawings. The notched end it of said latch bar normally engages the upper portion of the keeper plate 2i, when the device is in its locked position.

An elongated flat spring 22 is provided, with its lower end in the casing, on top of the anvil bar 8, as clearly seen in Figure 3. The upper end of fiat spring 22 normally presses against the latch bar M, for exerting inward pressure upon said bar, whereby it assumes automatically its locking position when the two sashes are in the position shown in the drawing. The operator can easily grasp grip I1 and swing the latch bar It outwardly (Fig. 3) when it is desired to release the device, whereby the sashes can be vertically adjustable to the desired position.

While I have described the preferred embodiment of my invention and illustrated the same in the accompanying drawings, certain minor changes or alterations may appear to one skilled in the art to which this invention relates during the extensive manufacture of the same, and I, therefore, reserve the right to make such changes or alterations as shall fairly fall within the scope of the appended claim.

What I claim is:

In a device of the class described. the. combination of a hollow elongated casing-,havinggan open bottom and a closed outer end and an open inner end and a partly closed top, an elongated. anvil bar filling said casing and closing the inner open end of said casing, said anvil bar. provided on one end with a sash-engaging lipvv depending: below the bottom face of said anvil? bar; a U-shaped saddle bracket withimsaiid: casing;v and engaging the bottom and two sides of said anvil bar, said saddle bracket having its upperportiozr extending through the top of said casing, a, latch 4 bar above said anvil bar and in continuous engagement therewith, and means fastening said latch bar to the extended upper end of said U-shaped saddle bracket.

CLARENCE J. DAWSON.

REFERENCES CITED The following references are of record in the file of. this patent:

UNITED STATES PATENTS Number Name Date 531,646 Read Jan. 1, 1895 621,578" Locklin et al. Mar. 21, 1899 885,116 Whipple Apr. 21, 1908 934,145 Denison Sept. 14, 1909 1,067,506 De Lappe July 15, 1913 1,183,537 Cole May 16, 1916 1,507,525 Stewart Sept. 2, 1924 1,762,280 Slingerland June 10, 1930 

